Whirling Dervish was decent for a 1/1 with protection from black, but the idea that it would be pumped throughout the course of the game by hitting your opponent was really the driving force behind its use
In particular, artists have been wavered between vaguely humanoid appearances and more alien forms
The rules knowledge below can also help with building some MTG Arena decks
Board wipes, targeted exile, and conditional removal help white decks recover even when the board gets out of hand
The Cosima side of this DFC is a bit less exciting in this deck than she might be elsewhere due to the absence of Fabled Passage, a land that Im not keen to introduce to the manabase since it conflicts with Frost Augur, but Cosima has still done solid work for me just as an early body that nets a bit of card advantage if the game stalls out
Did you already know about these tricks, or are you now tempted to add a few ability copiers to your next decks